7th Grade Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 7th Grade factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Factors, Multiples & Primes7th Grade Factors, Multiples and Primes Worksheet — Level 1 — Practice Set 2 — Answers
Part A: Factors
1.List all the factors of 12.
Answer: 1, 2, 3, 4, 6, 12
2.List all the factors of 30.
Answer: 1, 2, 3, 5, 6, 10, 15, 30
3.List all the factors of 35.
Answer: 1, 5, 7, 35
4.List all the factors of 28.
Answer: 1, 2, 4, 7, 14, 28
Part B: Multiples
5.Write the first five multiples of 8.
Answer: 8, 16, 24, 32, 40
6.Write the first five multiples of 6.
Answer: 6, 12, 18, 24, 30
7.Write the first five multiples of 7.
Answer: 7, 14, 21, 28, 35
8.Write the first five multiples of 3.
Answer: 3, 6, 9, 12, 15
Part C: Prime or not?
9.38 is a prime number.
Answer: False
38 = 2 × 19, so it is composite.
10.39 is a prime number.
Answer: False
39 = 3 × 13, so it is composite.
11.17 is a prime number.
Answer: True
17 has only two factors: 1 and 17.
12.45 is a prime number.
Answer: False
45 = 3 × 15, so it is composite.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.